Teradyne, Inc. (TER) shares tumbled 10.6% to $308.75 as of October 23, 2026, a sharp decline from the prior close of $345.49. BestStocks flagged the session as a major change for TER. Below, we break down what changed for TER, why it matters for investors, how the stock reacted, and the catalysts on the calendar.
What happened
TER fell 10.6% to $308.75
TER tumbled 10.6% in its latest session, moving from $345.49 to $308.75.
ValuationMedium confidence
Rel. volume
1.7×
Above Avg
Vs peers
—
No comparable peers
Market cap
$48.3B
NASDAQ Global Select
Analyst target
$462
+49.5% vs price
Price chart
Sep 22 – Oct 23
E earnings
F filing
A analyst
V/N other
click a marker to highlight
Change events — click to jump to details
What it means for Teradyne, Inc. investors
For Teradyne, Inc. investors, the recent signals add up to a bearish shift. On the constructive side: Positive price momentum. Weighing against that: Sharp 10.6% decline — elevated risk; Teradyne fell 3.15% to $332.42 as semiconductor and AI equipment stocks broadly retreated on macroeconomic headwinds. Wall Street's consensus price target sits at $461.50, implying +49.5% upside from $308.75. Over the past 90 days analysts logged 0 upgrades and 1 downgrade. BestStocks rates the overall signal quality medium (64/100). With earnings roughly 4 days out, the next report is the most likely near-term test of the move.
TER price reaction
TER last traded at $308.75, down $36.74 (-10.63%) from the previous close of $345.49. The session traded on 1.7× average volume (above avg), so the move carried above-average conviction. Over the past month the stock has ranged between $308.75 and $449.04, and it currently sits about 0% of the way up that band.
Bullish and bearish analyst opinions on Teradyne, Inc. (TER)
The consensus analyst price target on Teradyne, Inc. (TER) is $461.50, 49.5% above the recent $308.75. Over the past 90 days analysts logged 0 upgrades, 3 maintains, and 1 downgrade. Here is how the bullish and bearish cases on TER line up.
▲ The bullish case
+Wall Street's consensus price target of $461.50 implies +49.5% upside from $308.75.
+The Street's most bullish target is $550.00 (+78.1%).
+Positive price momentum.
▼ The bearish case
−1 analyst downgrade in the past 90 days, most recently Baird to Neutral (2026-08-21).
−Sharp 10.6% decline — elevated risk.
−Teradyne fell 3.15% to $332.42 as semiconductor and AI equipment stocks broadly retreated on macroeconomic headwinds.
−Teradyne fell 6.25% to $336.98 amid a broad semiconductor and AI sector rout, as reported by Reuters, CNBC, and the New York Times.
−Teradyne fell 6.12% to $357.01 as semiconductor and equipment stocks faced renewed selling pressure amid macro caution on AI infrastructure spending and valuation concerns.
Bull vs bear balanceBearish Shift
BearishNeutralBullish
Weighing both sides, BestStocks' composite read of recent signals is bearish, as the bull-versus-bear meter above shows. This is an educational summary of the bull and bear case, not investment advice.
Analyst price targets and ratings are FMP consensus figures as of Oct 23, 2026; other aggregators may differ. High and low targets show the range of estimates, not forecasts.
Teradyne, Inc. moved +6.52% intraday from $325.00 to $346.20. Cited by Google's AI Overview as a source for TER's move on 2026-10-19 (finance.yahoo.com).
Teradyne fell 3.15% to $332.42 as semiconductor and AI equipment stocks broadly retreated on macroeconomic headwinds. A hotter-than-expected inflation report earlier in the week has intensified fears of further Federal Reserve rate increases, pressuring growth-sensitive tech valuations (per MarketWatch and WSJ). The pullback is compounded by investor reassessment of TER's elevated valuation relative to historical asset value, despite strong fundamentals tied to HBM and edge AI testing platforms. Volume remains below average at 0.66x expected for this time of session.
Teradyne fell 6.25% to $336.98 amid a broad semiconductor and AI sector rout, as reported by Reuters, CNBC, and the New York Times. Investors are reassessing whether massive AI capital expenditure will deliver near-term returns, while rising Treasury yields and sticky inflation have pressured high-beta tech valuations. Peer semiconductor and equipment stocks—ASML, SK Hynix, Samsung—declined in tandem, dragging automated test equipment providers lower; volume was 1.26x normal at this time of day.
Teradyne fell 6.12% to $357.01 as semiconductor and equipment stocks faced renewed selling pressure amid macro caution on AI infrastructure spending and valuation concerns. The decline reflects profit-taking after the stock's strong year-to-date run and elevated P/E multiple (around 49x–50x), per web sources citing sector weakness and institutional repositioning ahead of Q3 earnings.
Teradyne shares rose 6.25% to $441.76 following positive analyst attention and momentum from the launch of its new Magnum E2 memory test system for AI applications, according to multiple Yahoo Finance sources. The gain reflects renewed confidence in the company's semiconductor test equipment positioned for high-bandwidth memory and data center chips, with analyst upgrades providing additional support.
Teradyne fell 11.81% to $334.89 intraday, despite inclusion in a Zacks article (dated 2026-09-14) highlighting the company among five top-ranked wide-moat stocks with strong growth prospects and favorable demand. Volume reached 1.21M shares (1.99x normal for this time of day), suggesting active institutional participation in the decline. No company-specific negative catalyst has been identified in available sources.
Teradyne fell 6.53% to $377.91 as semiconductor test equipment stocks faced a broad derisking wave on Wednesday, with peers Aehr Test Systems down 10% and FormFactor down 6% (247wallst.com). The selloff extended losses from Tuesday and follows weakness across chip equipment names including Applied Materials and Lam Research. Volume of 1.45M shares ran at 0.58x the time-adjusted expected level, below average.
Teradyne shares fell 10.15% to $398.14 on intraday trading (delayed data). While a web_catalyst was not captured, finance.yahoo.com cited multiple sources discussing the move on 2026-08-18. Volume of 2.08M shares traded at 0.95x the time-adjusted expected level — normal for this session time.
In-depth TER event analyses
Permanent, dated analyses of TER's most significant sessions.
TER tumbled 10.6% to $308.75. No single company-specific catalyst was confirmed during the move window, and it looks technical.
How much did TER stock fall?
TER lost 10.63% ($36.74) versus the prior close of $345.49, last trading at $308.75 on 1.7× average volume.
When is Teradyne, Inc.'s next earnings date?
TER's next earnings report is estimated for 2026-10-27 — about 4 days away.
What is the analyst price target for TER?
The consensus analyst price target for TER is $461.50, about 49.5% above the current $308.75. Over the past 90 days, analysts recorded 0 upgrades, 3 maintains, and 1 downgrade.
How BestStocks tracks TER
This page is generated automatically by BestStocks' change-detection system after its price and volume cleared TER-specific materiality thresholds, triggering an evidence check. It draws on 20 tracked change events for TER, cross-checked against the data sources listed below. Price, volume, and market-capitalization figures are the live intraday quote as of October 23, 2026 and refresh as new information is detected; for companies with multiple share classes, market-cap figures can differ by data source. Analyst price targets and ratings are FMP consensus. This is an educational summary of what changed and why — not personalized investment advice.
